no live upstreams and NO previous error

drookie nginx-forum at
Thu Sep 15 06:49:08 UTC 2016

(yup, it's still the author of the original post, but my other browser just
remembers another set of credentials).

If I increase verbosity of the error_log, I'm seeing additional messages in
log, like 

upstream server temporarily disabled while reading response header from
<backend IP>

but this message doesn't explain why the upstream server was disabled. I
understand that the error occured, but what exaclty ? I'm used to see
timeouts instead, or some other explicit problem. This looks totally
mysterios for me. Could someone shine some light on it ?

Posted at Nginx Forum:,269577,269583#msg-269583

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